What is the cosmic microwave background (CMB)?
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YouTubeAthena Brensberger
What is the cosmic microwave background (CMB)?
🔭 Ever wondered what the oldest light in the universe looks like? Meet the Cosmic Microwave Background Radiation (CMB), the faint afterglow of the Big Bang, still echoing across the cosmos nearly 13.8 billion years later. This radiation is a snapshot of the universe just 380,000 years after its birth, when it first cooled enough for light to ...
22.5K viewsJun 28, 2025
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